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Ultra-Wideband RCS Reduction Based on Non-Planar Coding Diffusive Metasurface.

Guozhang Wu1,2, Wenqi Yu1,2, Tao Lin3

  • 1State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.

Materials (Basel, Switzerland)
|October 29, 2020
PubMed
Summary

A novel non-planar coding metasurface effectively reduces radar cross-section (RCS) over an ultra-wideband, offering angle and polarization insensitivity for advanced microwave applications.

Keywords:
discrete particle swarm algorithmmetasurfacenon-planarradar cross-section (RCS)ultra-wideband

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Area of Science:

  • Electromagnetics and Metamaterials
  • Applied Physics
  • Microwave Engineering

Background:

  • Metasurfaces offer unique electromagnetic properties for controlling wave propagation.
  • Reducing radar cross-section (RCS) and achieving diffuse scattering are critical in stealth technologies.
  • Optimization algorithms are essential for designing complex metasurface structures.

Purpose of the Study:

  • To propose a novel non-planar coding metasurface for wideband RCS reduction and diffuse scattering.
  • To optimize the metasurface design using the discrete particle swarm algorithm (DPSO).
  • To investigate the metasurface's performance under various incidence angles and polarizations.

Main Methods:

  • Design of two unit cells ('0' and '1') with a specific phase difference for interference cancellation.
  • Optimization of the non-planar metasurface structure using DPSO.
  • Analysis of monostatic and bistatic RCS reduction through simulation and experimental validation.

Main Results:

  • Achieved a 10 dB monostatic RCS reduction from 6.4 to 29.6 GHz (bandwidth ratio of 4.62:1).
  • Demonstrated superior bandwidth for RCS reduction compared to planar surfaces.
  • Confirmed ultra-wideband, angle insensitivity, and polarization insensitivity.

Conclusions:

  • The non-planar coding metasurface exhibits excellent wideband RCS reduction and diffuse scattering properties.
  • The DPSO optimization effectively tailored the metasurface for enhanced performance.
  • The validated design holds significant potential for RCS reduction and other microwave applications.